you needn't puzzle over every single word or phrase in the book
Related Translations:
用不着: 1.(用不上) no need; have no use for 短语和例子把用不着的书放回书架。 put back the books you are not using on the shelves.2.(不需要) there is no need to; it is not worth while to 短语和例子用不着为这些小事争论不休。 there is no n